66089560 has 32 divisors (see below), whose sum is σ = 149474160. Its totient is φ = 26298496.

The previous prime is 66089503. The next prime is 66089561. The reversal of 66089560 is 6598066.

66089560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66089561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3687 + ... + 12073.

Almost surely, 2^66089560 is an apocalyptic number.

It is an amenable number.

66089560 is an abundant number, since it is smaller than the sum of its proper divisors (83384600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66089560 is a wasteful number, since it uses less digits than its factorization.

66089560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8595 (or 8591 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 66089560 is about 8129.5485729529. The cubic root of 66089560 is about 404.3067141171.

The spelling of 66089560 in words is "sixty-six million, eighty-nine thousand, five hundred sixty".